The neutronics calculation is performed by the Los Alamos National Laboratory code system, version 4a or later (CCC-200 or CCC-660),and the depletion and isotopics calculation is performed by CCC-371/ORIGEN2.1 developed at Oak Ridge National Laboratory. MCNP and ORIGEN2.1 are NOT included in this package. MOCUP consists of three utility programs (mcnpPRO, origenPRO, compPRO) to, respectively, search the MCNP output and tally files for relevant cell and tally parameters, prepare ORIGEN2.1 input files and execute the ORIGEN2.1 runs, and search ORIGEN2.1 punch files for relevant isotope concentrations and produce new MCNP input files. A graphical user interface is provided for execution convenience.

DEC Alpha workstations with OSF/1, DEC 5000 workstations with Ultrix, or HP workstations with HP/UX. The disk and memory requirements are dictated by MCNP and ORIGEN2.1.
Implementation has been limited to DEC Alpha workstations with OSF/1, DEC 5000 workstations with Ultrix, HP workstations with HP/UX, and PCs with Linux. Other implementations are not supported at this time.